Answer:
Option "D" is the correct answer i.e. Both Technicians A & B
Step-by-step explanation:
Dear,
Loose wheel bearings can be caused on any machine.
The Following can be the reasons :
- the machine or motor is installed improperly
- the rotor(rotating part) of machine is not balanced
- the cover get deteriorated with time
- Bad manufacturer
So, when the bearings will be loose then the following can happen:
- It will produce vibration in machine which can be judged by a vibration pen eg. SKF vibration pen
- The vibration will also result in noise. You can check by
- The machine winding if it is motor will burn-out.
- Bush needs to be installed if the bearing runs loose.
Therefore, "D" is right.